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// Copyright (c) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "source/fuzz/transformation_add_global_undef.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/opt/reflect.h"
namespace spvtools {
namespace fuzz {
TransformationAddGlobalUndef::TransformationAddGlobalUndef(
spvtools::fuzz::protobufs::TransformationAddGlobalUndef message)
: message_(std::move(message)) {}
TransformationAddGlobalUndef::TransformationAddGlobalUndef(uint32_t fresh_id,
uint32_t type_id) {
message_.set_fresh_id(fresh_id);
message_.set_type_id(type_id);
}
bool TransformationAddGlobalUndef::IsApplicable(
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
// A fresh id is required.
if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
return false;
}
auto type = ir_context->get_def_use_mgr()->GetDef(message_.type_id());
// The type must exist, and must not be a function or pointer type.
return type != nullptr && opt::IsTypeInst(type->opcode()) &&
type->opcode() != spv::Op::OpTypeFunction &&
type->opcode() != spv::Op::OpTypePointer;
}
void TransformationAddGlobalUndef::Apply(
opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
auto new_instruction = MakeUnique<opt::Instruction>(
ir_context, spv::Op::OpUndef, message_.type_id(), message_.fresh_id(),
opt::Instruction::OperandList());
auto new_instruction_ptr = new_instruction.get();
ir_context->module()->AddGlobalValue(std::move(new_instruction));
fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
// Inform the def-use manager about the new instruction.
ir_context->get_def_use_mgr()->AnalyzeInstDef(new_instruction_ptr);
}
protobufs::Transformation TransformationAddGlobalUndef::ToMessage() const {
protobufs::Transformation result;
*result.mutable_add_global_undef() = message_;
return result;
}
std::unordered_set<uint32_t> TransformationAddGlobalUndef::GetFreshIds() const {
return {message_.fresh_id()};
}
} // namespace fuzz
} // namespace spvtools
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